
Surf Forecasts:
Mimitsu surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 6AM (local time) - 18ft (5.5m), 16s period, ESE swell with cross-offshore winds.
- Most powerful swell: Thursday 6 Aug, 6PM (local time) - 21ft (6.5m), 15s period, ESE swell with 18,081 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 6AM (local time) - 18ft (5.5m), 16s period with ESE swell.
Best Forecast Surf Conditions for Mimitsu this week:
The surf forecast for Mimitsu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 6AM. The primary swell is predicted to be 5.5m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mimitsu in the next 16 days are 6.5m 15s and forecast to arrive on Thursday (Aug 06) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 13s period and expected on Friday (Aug 07) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 6th Aug) | 18ft (5.5m) 16s |
| Best Surf | 6AM (Thu 6th Aug) | 18ft (5.5m) 16s |
| Most Powerful | 6PM (Thu 6th Aug) | 21ft (6.5m) 15s |
Table - best surf conditions forecast for Mimitsu over the next 16 days.
The Lowdown
Alright, let's get real about Mimitsu. This forecast is a classic case of a spot getting slammed by way too much juice, and then just going flat and sloppy. It's a fickle river mouth, and the ocean isn't doing us any favors.
Right now, the ocean is furious. Thursday morning is showing a massive 18ft (5.5m) of east-southeast swell with a long 15-second period. The energy reading is a huge 13350 – that’s a lot of power. But the forecast says it's simply too big for this break. The wind is 25 km/h from the northeast, blowing cross-offshore, so it *looks* clean, but trust me, that much water moving through a river mouth is just a chaotic, boiling mess. It’s not surfable.
It gets worse before it gets better. Thursday afternoon, the swell jumps to 20ft (6.0m) with a 16-second period, and the energy goes even higher to 17789. The wind swings around to the east and strengthens to 35 km/h. It’s just a total, blown-out mess. Friday is more of the same, with 20ft (6.0m) of southeast swell and onshore winds and thunderstorms. It's a disaster zone. The whole weekend is like this – anywhere from 8 to 16ft (3-5m) of churning, wind-whipped swell, with the energy readings in the thousands. It's not just bad; it's dangerous.
Monday settles down a bit, but the wind is still up. The morning's small, but it's blowing 30 km/h. The afternoon brings the swell back up to 10ft (3.0m), but it's got an onshore wind with it. It's all just poor.
Tuesday and Wednesday are a write-off, with small, weak swells and crappy winds. The energy has dropped off a cliff to the low hundreds.
Now, for the second week, things get a little more interesting. The standout is the morning of Thursday, August 13th. The winds go dead glassy. That's the key. The swell is a modest 3ft (1.0m) from the east, but it holds a long, clean 14-second period. The energy is low, 432, but it doesn't matter. For this break, clean and glassy is everything. It's an inconsistent spot, so you'll wait between sets, but the waves that come should be worth it. This is your window.
The morning of Saturday, August 15th is a secondary option. It's got a similar swell size, 4ft (1.3m) from the east, with an 11-second period, and a light cross-offshore wind. It won't be as clean or as organized as Thursday, but it's still a shot. Then there's a glassy morning on Tuesday, the 18th, but the swell has backed off to 3ft (1.0m) with a shorter 9-second period. It's surfable, but small.
So, the takeaway is this. The first week is a total loss. Forget it. The second week offers a couple of clean, small windows, with Thursday the 13th being the clear standout. But even then, this is a fickle break and these are small waves. Don't get your hopes up for anything epic. It's just about finding a clean one.
Rusty, out.
Short Range ForecastHeavy rain (total 150mm), heaviest during Sat afternoon. Warm (max 29°C on Thu morning, min 26°C on Sat afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 68mm), heaviest during Sun morning. Warm (max 29°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ESE 15 | ESE 15 | SE 14 | SE 14 | SE 13 | SSE 13 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | E 13 | SSE 11 | SSE 12 | SSE 11 | E 12 | E 11 | E 11 | E 12 | E 11 | E 11 |
Wave Graph | |||||||||||||||||||||
13173 | 16759 | 15773 | 12258 | 10676 | 5610 | 1738 | 1658 | 1230 | 1183 | 567 | 595 | 1194 | 1578 | 799 | 271 | 195 | 191 | 284 | 256 | 345 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-off | glassy | on | cross-off |
High Tide | 12:20PM1.47m | 11:41PM1.70m | 2:21PM1.46m | 00:48AM1.67m | 4:02PM1.56m | 2:09AM1.68m | 5:00PM1.68m | 3:21AM1.74m | 5:39PM1.79m | 4:19AM1.83m | 6:12PM1.87m | 5:08AM1.92m | 6:42PM1.93m | ||||||||
Low Tide | 5:29PM1.13m | 7:08AM0.69m | 6:55PM1.27m | 8:32AM0.61m | 8:47PM1.31m | 9:41AM0.49m | 10:06PM1.27m | 10:34AM0.36m | 10:58PM1.18m | 11:19AM0.26m | 11:39PM1.08m | 11:58AM0.20m | 00:14AM0.97m | ||||||||
5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | |
— | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | |
mm | 1 | 5 | 21 | 10 | 10 | 22 | 16 | 39 | 26 | 11 | 12 | 24 | 10 | 8 | 3 | — | — | — | — | — | — |
Temp °C | 29 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 29 | 29 | 26 | 29 | 29 | 26 |
Feels °C | 29 | 28 | 27 | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 30 | 32 | 33 | 31 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 15 | ESE 15 | SE 14 | SE 14 | SE 13 | SSE 13 | S 12 | S 12 | S 12 | S 11 | ESE 8 | ESE 8 | SSE 8 | SSE 12 | SSE 11 | S 11 | S 11 | S 11 | E 12 | E 11 | E 11 |
13173 | 16759 | 15773 | 12258 | 10676 | 5610 | 2210 | 1245 | 819 | 357 | 567 | 453 | 596 | 1269 | 799 | 565 | 403 | 326 | 284 | 256 | 345 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | E 16 | E 16 | E 15 | E 15 | E 15 | E 15 | SSW 13 | S 12 | S 11 | E 13 | E 12 | E 12 | E 12 | E 11 | E 11 | S 10 | S 10 | S 10 |
— | — | — | 5 | 20 | 17 | 17 | 17 | 18 | 229 | 714 | 556 | 569 | 437 | 416 | 271 | 195 | 191 | 204 | 196 | 156 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 16 | E 15 | E 13 | E 13 | ESE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 |
— | — | — | — | — | — | — | — | 10 | 107 | 345 | 595 | 21 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | — | — | SSE 11 | SSE 12 | ESE 6 | — | — | — | — | — | — |
— | — | — | — | — | 1598 | 1738 | 1658 | 1230 | 1183 | — | — | 1194 | 1578 | 58 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 241 | 317 | 752 | 241 | 752 | 752 | 752 | 766 | 752 | 241 | 752 | 752 | 235 | 661 | 804 | 235 | 235 | 197 | 0 | 15 | 109 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Mimitsu Surf forecast
The above surf forecast table for Mimitsu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mimitsu can be found by selecting the local surf guide option on the grey menu. Our Mimitsu surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Mimitsu) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Mimitsu may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Mimitsu is 25 km (16 miles) from the city of Takanabe. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Takanabe. Takanabe has rooms for a wide range of budgets as well as car hire and transport links.











